Dynamics of transparent exopolymeric particles (TEP) and particle-associated carbohydrates in the Dona Paula bay, west coast of India
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Bhaskar, P.V.
Bhosle, N.B. |
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| Date |
2006-05-12T04:30:43Z
2006-05-12T04:30:43Z 2006 |
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| Identifier |
Journal of Earth System Science, vol.115(4), 403-413p.
http://drs.nio.org/drs/handle/2264/99 |
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| Description |
Surface seawater samples were collected over a period 33 of 27 months at a shallow water station in Dona Paula bay from 1998-2000. The samples were analyzed to assess the seasonal variations, inter-annual variability and the contributions of i) transparent exopolymeric particles
(TEP) concentration, ii) two forms of particle-associated carbohydrates- 1.5M NaCl/saline extracted (Sal-PCHO) and 10mM EDTA-extracted (CPCHO) and iii) total bacterial abundance (TBA) to particulate organic carbon pool. A distinct inter-annual variability was observed with an increase in the bacterial abundance, chlorophyll a (chl a), TEP and Sal-PCHO and their greater contribution to particulate organic carbon during May 1998-1999 than in June 1999- July 2000. Overall, there was no statistically significant correlation of TEP with phytoplankton biomass (Chl a), Sal-PCHO, CPCHO and hydrodynamic conditions. A weak inverse correlation was observed between TEP and TBA (r= -0.397; p<0.05) but the role of TEP as a C-source for bacteria was not evident. Both Sal-PCHO and CPCHO appeared to be two distinct forms of carbohydrates. Unlike CPCHO, Sal-PCHO concentrations showed a positive trend with chl a and significant linear correlation with bacterial abundance (r= 0.44, p< 0.007, n= 48), indicating that Sal-PCHO as carbon source might have supported bacterioplankton abundance. The mean %TEP-C contribution to the annual average organic carbon for 1998-2000 was 6.9% ± 5.8% and next only to phytoplankton-C (33.1 ± 22.1%) and greater than bacterial-C (4.6% ± 4.6%) or carbohydrate-C (< 3.8 %). Despite its greater contribution to the organic carbon pool, the contribution of TEP-C to the benthic carbon demand and its fate in the study area could not be ascertained in this study.
CSIR for fellowship |
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| Format |
534695 bytes
application/pdf |
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| Language |
en
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| Publisher |
Indian National Science Academy
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| Subject |
TEP
carbohydrates bacteria dynamics |
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| Title |
Dynamics of transparent exopolymeric particles (TEP) and particle-associated carbohydrates in the Dona Paula bay, west coast of India
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| Type |
Journal Article
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